Closure check



A. J. BUSH CLOSURE CHECK Mar, 3. 19275.

Filed April 4, 1924 Ythe following' is a specification.

Patented Mar. 3, 1925.

UNITED STATES PATENT OFFICE.

ALDEN J. BUSHI OF COLUMBUS, OHIO.

CLOSURE CHECK.

Application ait-aA April 4,

This invention relates to improvements in closure checks for doors and the like, it more particularly relating to a device of this kind which has pneumatic checking means and an Vautomatic brake controlled by the air comt pression.

An object of my invention'is to provide a. closure checkwhich will be simple in conf struction,economical in manufacture and efder the action of an unusual extraneous force.

In the accompanying drawing: Fig. 1 is an elevation of a device embody` ing my improvement shown andvapplied to a closure in this case a door and doorl case.

Fig. 2 is a longitudinal section with;a',clos. ing spring omitted.

Fig. 8 `is a Fig.-2. g

Fig, 4 is a section on the line 4 4 of Fig. 2.

Fig. 5 is an end view'of the brake members.

Fig. 6 .is a longitudinal sectional view of a portion of the device showing the brake members in braking position' Fig. 7 is a vertical section offthespring closing devices. y; r

Referring to the drawings, lfrepres'ents a cylinder the ends of which have threaded thereon caps. 2 and 3'. "The 'cap 2-Vis formed with anintegral yoke 4 perforated' to' receive a shaft 5 one end ofwhich has connected theretoa notched disk 6, the other end of which has a threaded bore to receive a screw 7 (see Fig. 7) which confines the washer 8 to retain the shaft in position. *A collar 9 is mounted on the shaft to rotate therewith, the shaft and collar being Vprovided with coinciding flat faces for this purpose and a coil spring 9 is placed aboutthe shaft between the arms ofthe yokes, one end of the spring being connected to the collar and the other and of the spring havinga bearing against to close the door or othenclosure. I "justment of 'the sprngmay Vbe` eifected'by .causing the pawl to engage'inl any one of lthe notches kof the disk.

1924. Serial N0. 704,276;

the yoke. That end of the shaft which car-y l `ries the notcheddisk, in the present case the lower end, is secured by a screw 10 to an arm 11 of a bracket 12 which' bracket is fastened Ato thedoor case 13. The arm of the bracket carries a pawl 6 to engage with the notched disk, as a result of which when the door D is opened t-he yoke will be rocked about the shaft which is confined against movement by the engagement of thepawl with the notched disk which places the springunderrltnsici e a Slidably mounted' in -thejcylinder is a `piston 14 which has a short stem 15 which as lintegrally formed therewith a wedge member 16 having a pair of oppositelyarranged incline faces 17 `of the wedge, and which has fixed thereto a projecting sleeve 18 which is slidably mounted upon the inner end of apiston rod 19, the forwardv end of the rod being pivoted to a bracket d on the ydoor I). Thersleeve has a slotted2 opening 20 into which projects a pin 21carr1ed by the rod so that the sleeve androd may have a limited' movement relatively to each other.

v Y A coil spring 22interposed between the cam section on the line 3-#3' of .l

member and a block 24 secured to the rod'19 .by the pin 25 serves to hold the piston and itsvconnected parts to the-rod 19 in distended` relation. The piston is of that kind which has an annular'recess and carries a flexible sleeve cup 26 which is conlined bethe piston and the-inner end. ofthe cam member` wh'enthe piston is screwed'upon the stem',l Thev disk 29 is confined between an eXtensionO ofl the` block `25 and a. cotte-rA pin 31 to act as a guide. The cylinder has a plurality of smallV apertures 32 placed at different points inthe 'length thereof to permit the' escapel of the air during v the closing movement of the parts and the resistance of the vspring 22 is such that under normal conditions the parts will be maintained in the position shown in Fig. 2. In the event, how ever, that unusual pressure should be brought upon the door or other closure by slamming or wind gusts to thereby increase the pressure of air in the cylinder the piston and the member connected therewith willjbe ly arrested whicli willcai e" temporarily arrested against-the tension/otl the spring 22 which actionsbrlngs into operation braking devices now to be described-.M

Loosely mounted uponthe ends of the pin` 25 are wear plates 33 the ends of the pin eX- tending through apertures Sel in these-plates.v The forward ends of the plates rest on the lower ends ot' the inclined vfaces '17.1 -lVlien the movement is imparted between the piston andthe rod19, this'ilesult's in' 'causing the'i'fnclined faces 1'? to expalnd the plates to thel p'osition's'hown 'in Fig'. 6I Each of 'the plaftesfhas a laterally projecting pinj and drical brake shoes- 36 eachbrake shoe' 'be'- ingprovidedwithan'apertiire 37 to loosely receive theborre'spdndinglpin? 35, and' -also having-af be "ss-' 3G l ab dut thef qer'tttreT therein whiehl rest-sf' apen 'the fe'ofresjpend 'fplatie which actsfto maintain the 'she lel relation with the" cylinder` 'f these l"brake "shesf is 'p'referably'I faced" with leather-38 andthe 'endsof the shoes areresiliently connected together bysprngsBQ, each spring being piece` 'et 'sprirgwire of vsenii-cylindrical'form 'liavingl44 its "ends bent andiy Iinserted in siiiallatpertures' in Ithe ends of the respeetive brake shoes The combined diameter s" of tlietwo bral'e shoes" and'fjtheir coverings' are "somewhat yless "than the` inner diameter of thecyliiider Vso that the? brake shoes areont of contactwitlthe" interior kof thecylinde' being so heldby the'spring's 39.

' Infthe event; howev'en* of an undudpressure Y 'upon the door or other* 'devie which it is closr ing resulting in a'n increased i pressure 'of f air in the cylinder, ,thepiste'v `ill'lo'e/ tem'pe'rarithefw'e'ar 'plates tdride uponthe'inclined 'faces `1"? and'f'thereby wedge the brakeshee 'members yiinto fric-y tional enga'geiiient iwithftlierl interior ofthe cylinder as' clearlyshown'in Fig.- G. rIhis temporarily locks the'd'oi" against both' clos-- ing' andrebonn'd `which effect "continues nntil the normal' lair pressure tension" `has"been restored in 'the cylinder, 'wh'erenpon the spring@ win-throw' the piston @amended position, :relatively to the' rod' 19 causing the wedge to'be w'itlidrawnrom engaging position, thereby' 'ieleasing' wear` 'pines' sa nem engagement vfrnrthe inclins I7. Thislengagin'g and releasingy acti'onis i'n'diretfc'orresponden'ce with 'and indirect propo'rti'onfVVV to the amount of compression ahead' of thel" ypiston.' Cnsequentlyit automatically 'acts to takefcare of any' unusual v:torce tending to eclosinglmovement of Ath door. Having tliu's' described myV in've'ntion,l

clani: v' l I 1. `Ini adevice of the character described,

the"con'ibination,I of a door-springlwith a-cyl-` supplemental device wlieneveranyy abnormal t'orce'tends toy cause a rebound of the door.

2.V Ina device of the character described, the combina-tiomot' a door spring with a cylinder connected therewith, an air operated piston, a supplemental device moving simultaneously with said piston, means for intermittentlyP operating said device to engage the cylinder whenever the door tends to rebound by anabu`or1nal force `andtor vre- 7 leasing 'sa'idl engagement as soon t'as saidffrce -hasrs'pent itself: 3.1111 aJdevi'ce of the'lcharacterfdescribed, a ',cyl'ineler,'a'l pistoniv in saidcylinder', a pis- *f ton r'od connected with.- said piston in a @manner to permi'tsai ist'onltohavefal limited fmovementrelatively to the rodi; 'supplement-a1 "devices movablel''withl fsaid: rbd to 'co-operate l'with the i inner wall of 'said'f Icylinder, and 1 i means Yoper'ated yby "thel pistonffwhen moved reltiv'elyfto 'the Yrod froperating "said snpplelnental devices. y 1

4. In a; devic'eoffthe characteridescribed, a cylindefa piston ninisai-d,"cylindernal 'piston rod', means includingrla` spr-ingror connecting the piston and rodin a Inannei' t'o "permity thepiston to Yhave ailirriited movement' 'rela-tively? to 'the'rod against f tension of' "said ljspri'ng; Vsupplemental f devicesf movable with said rodto 'co-operate withnthe 95 interior of the cylinder, and? meansmovable with said piston for throwing said supplemental devices into engagingiposition, 1 when `-said!piston''movesrelatively to the' rod 5v." In av 'device'` Aof f the "character fdese'ribed, 100 a eylin'c'l-jrl,iA apistoniin said cylinderga pis- `Vt'on irodvconnected' witlisaid piston' in a manner to permit a limitedinovement'ofsaid I piston i'n'thefdirefcti'on offsaidirod but in-f' dependently thereof, a spring for normally heldingUsaid-piston against such movement, said piston (go-operating with the vtluidin said cylindeittov regulate the movement ofV said rod through said cylinder, siqap'le-IV ment-alli 'devices movable withzsaidf rod, yand a 1 10 'cam carried' by"='said2'piston ftothrow said supplemental r'devices to en'gaging position against thewaillsoi said cylinder when said piston is given a movement relatively'to said-w rod"=b'yifan inctfeasedfpressureo'iHuid in said 115 cylin'derf 1 Y 6. 'In a deviceL of the' characten described, fa cylinder, Ja pist/onlin saidcylinder, a .pisf`t`on"`rod, fa yconnection between said'spiston` andro'd such' ais to permit lthepist'on tonnove 120 relatively tosaid'rod; a springrto'resistsuch movement,='a pair ofsemi-cylindrical'shoes loosely'carriedwby' saidE "rod,-l Vand a pair. :of cams 'fcarried .b'y"saidI piston: to lco-operatev 1 withi said i shoes toforcelthe same; against fthe interior walls-off said' cylinderwhen sadpisinder- 'connected therewith and-afpiston,l a"fton'movesfrelativelylto saidrrod.

snpplementaldevice' normally out of engage--v`1` ine'nt withthe cylinder, 1and means for au'to'- matically "connecting the cylinder`- with Vthe 7. Inadevice vof the character-described, a cylinder, a piston in-saidcylinderya pis--` f'ton rod connected with said piston in away 130 to permit said piston to move a limited dissaid rod, a pair of shoes loosely carried by tance relatively thereto, e spring to resist said weer plates, und Cams carried by Said such movement, said piston cooperating piston cooperating With said plates. 10 with the fluid in said cylinder to cheek the In testimony whereof, I have hereunto set movement of said rod, said cylinder having my hand this 25th day of March 1924.

apertures for permitting the escape of the air, a pair of wear plates loosely carried by ALBEN I J. BUSH. 

